Collector-ring.



No. 827,300. y PATBNTED JULY 31, 1906.

'11.,GB1SENH0NER- COLLECTOR I G. APPLmATIoN FILED .10, 1905.

imlLlglmw Iumlnnmm Z 3 1 ITNESSES He INVENTOI UNITED STATES PATENT OFFICE.

HENRY GEISENHONER, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION NEW YORK.

COLLECTOR-RING.

Specification of Letters Patent.

Patented July 31, 1906.

Application led February 10, 1905. Serial No. 244.996.

T0 a/ZZ whom it may concern:

Be it known that I, HENRY GEISENHNER, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Collector-Rings, of which the following is a specification.

My present invention relates to the collector-rings for dynamo-electric machines; and it consists in certain novel and useful features of construction and arrangement.

The various features of novelty which characterize my invention are pointed out with particularity in the claims annexed to and forming a part of this specification'. For a better understanding of my invention, how ever, reference may be had to the accompanying drawings and descriptive matter in which I have illustrated and described one of the forms in which my invention may be embodied.

Referring to the drawings, Figure 1 is an elevation s owing a collector-ring mounted on the shaft of a dynamo-electric machine, the shaft being shown in section. Fig. 2 is a section of the collector-ring, taken on line 2 2 of Fig. 1, with the shaft and shell removed; and Fig. 3 is an elevation of the insulated pin which supports the collector-ring with a portion of the shell in section.

In the drawings, 1 represents the shaft of the dynamo-electric machine, to which a shell or collar 2 is shown keyed. The annular collector-ring 3 is provided with studs 4, the inner ends of which rest in an annular groove 5, formed for the purpose in the shell member 2. As shown in Fig. 1, one of the studs 4 is provided with an extension 6, which iits in a ocket or socket formed for the purpose in t e shell member 2 and prevents angular movement of the collector-ring with respect to the shell.

In the construction shown the collectorring is formed in two similar separable parts 3 and 3". .These parts are connected together by suitable clamping devices 7. Each part of the collector-ring comprises an outer annular or cylindrical contact portion S, which may be rectangular in cross-section, as clearly shown in Fig. 2, and an inner radiallyextending web or portion 9. The brush or brushes (not shown) cooperating with the collector-ring, bear against the outer periphery of the annular portion 8.

,the portion 8 of the collector-ring and As shown, the web portion 9 is cut away at two places in each half to form two arcshaped slots 10 and two flexible portions, arms, or brackets 11. Each iiexible portion 11 is provided midway between its ends with a radially-extending socket portion 12. Each stud 4 is secured in the `corresponding socket portion -12 in the following manner: In each socket portion 12 is iitted a tubular member 13. The inner end of each tubular member 13 is provided with a collar or flange portion 14, which abuts against the inner end of the socket member 12. The outer end of each member 13 is threaded and is screwed into a nut 15, located between the inner surface pf t e outer end of the socket member12. This serves to rigidly clamp the member 13 in the socket member 12. The nut may be split or slitted, as shown at 16, and the two halves formed by the slit may be spread apart by a chisel or in any suitable manner in order to lock the nut permanently to the member 13. A stud member 4 is permanently secured in each tubular member 13 and at the same time insulated therefrom by a filling 17 of some insulating material having the proper mechanical strength. This insulating material is preferably inserted in a plastic condition. In order to increase the strength of the connection between each member 13 and corresponding stud 4, the upper end of the stud is deformed in any suitable manner, as by forming in it an annular groove or depression 18. Holes 19 may be formed in the member 13, into which the insulating material 17 extends. It will be observed that the exible portions 11 are oblong in section, (see Fig. 2 the radial dimension of the section being the greater. This gives a flexibility which allows a limited movement of the portion 8 of the collector-ring parallel to the axis of the shaft 1.

In dynamo-electric machines the rotating parts carrying collector-rings, such as fields or armatures of alternators or armatures of rotary converters and the like, are usually given a periodical to-and-fro movement parallel to the axis of rotation in order that the collector-rings may not be grooved by the brushes. Unless a certain amount of iiexibility is iven to the collector-ring construction the lirush friction opposing the longitudinal to-and-fro movement of the rotating IOO part and the collector-rings tends to cause the studs to work loose from the shell or the collector-ring. This difficulty is overcome by the construction shown and described. The means for securing the stud 4 in the shell member 13 is simple and effective and may be chea ly constructed.

It of course be obvious to all those skilled in the art that my invention may be readily utilized in' a construction in which a stationary collector-ring is employed in conjunction with rotating brushes which are given a movement parallel to the axis of the collector-ring in order to prevent grooving of the surfaces of the collector-ring and the brushes.

With the construction shown the collectorrings are very effectually cooled. The enlarged cylindrical socket parts l2 serve as vanes to create air-currents which carry heat away from the collector-rings. Owing to the formation of the slots 10, the flexible parts l1 are particularly well cooled. Moreover, from the construction and arrangementof the parts, and particularly from the reduced cross-section of the parts l1, the transfer of heat from l the collector-ring portion 8 to the socket portions 12 and studs contained in them is slow. As a result, the insulation surrounding the studs is not exposed to a temperature liable to damage it.

While in the accompanying drawings and descriptive matter I have illustrated and described the best form of my invention now known to me, it will be obvious to all those skilled in the art that many changes may be made in the form in which my invention is embodied Without departing from the spirit of my invention.

I/Vhat I claim as new, and desire to secure by Letters Patent of the United States, is

l. In a dynamo-electric machine, a collector-ring, and means for securing it to its support, said means beinor flexible to permit a limited movement ofthe collector-ring relative to the support in a direction parallel to the axis of the ring.

2. In a collector-ring, a main portion, a radially-extending socket portion having a socket formed in it separated from the main portion by a space, supporting means entering said socket, and a nut for securing the supporting means to the collector-ring located in said space between the socket portion and the collector-ring.

3. A collector-ring, comprising an external portion and an internal portion, said internal portion being cut away to form a flexible part, said flexible part being formed with a socket, supporting means for the collectorring entering said socket, and a nut for securing the supporting means in the socket located in the cut-away space.

4. In a collector-ring, an external cylindrical portion, an internal portion provided with a radial socket or passage, said portions being formed so that a space exists between the outer end of the socket and the external portion, supporting means entering said socket, and a nut for securing the supporting means to the rin located in the space between the externa portion of the ring and the socket.

5. A collector-ring, comprising an external cylindrical portion and an internal radiallyextending web portion, said web portion being separated by spaces from the external portion and being formed with radially-extending sockets adjacent said spaces, securing means entering said sockets, and nuts located in said spaces for securing the supporting means to the collector-ring.

6. A collector-ring, comprising an external portion and an internal portion formed with a radially-extending socket, the outer end of the socket being separated from the external portion of the collector-ring by a space, supporting means entering said socket, and a nut located in said space for securing said supporting means to said collector-ring.

7. In a collector-ring, an external portion, an internal portion formed therewith, parts of said internal portion being separated from the external portion to form arms or brackets, said arms or brackets being formed with radially-extending sockets located midway between their ends, supporting means entering said sockets, and nuts located in the spaces between said arms and said external portion for securing the supporting means to the ring.

S. In a collector-ring, an external portion, an internal portion integrally connected thereto, said external portion being separated from said internal portion at places by spaces to form arms or brackets, sockets formed in Said brackets between their ends, collectorring studs entering said sockets, and nuts located in the spaces between the external part and the arms for securing the studs and the sockets.

9. In a collector-ring, an external portion, an internal portion integrally connected thereto, said external portion being separated from said internal portion at places by spaces to form arms or brackets, sockets formed in said brackets between their ends, collectorring studs entering said sockets, nuts located in the spaces between the external part and the arms for securing the studs and the sockets, and means for locking the nuts to the stud.

10. In a collector-ring, an external portion, an internal portion integrally connected thereto, said external portion being separated from said internal portion at places by spaces to form arms or brackets, sockets formed in said brackets between their ends, collectorring studs entering said sockets, and nuts located in the spaces between the external part IOO IIO

and the arms for securing the studs and sockl ternal portion for securing said member in ets, saidnuts being of a thickness equal to the distance between the arms and the external portion.

11. In combination, a support, a collectorring, and means for securing the collectorring to said support, said means being made fiexible to permit movement of the collector: ring relative to the support in a direction parallel to the axis of the ring.

12. A collector-ring, comprising an external cylindrical portion and an internal radially-extending web portion, said web portion being cut away to form parts which are flexible in a direction parallel to the axis of the collector-ring, and supporting means engaging said flexible parts.

13. In a collector-ring, a socket, a tubular member secured therein, and a stud centrally located in said tubular member and secured thereto by a filling of insulating material inserted in a plastic condition.

14. In a collector-ring, a main cylindrical portion, an internal portion, a socket carried by the internal portion, a member located in said socket, and a nut located between the main portion of the collector-ring and the insaid socket.

l5. In a collector-ring, a main cylindrical contact portion, an arm or bracket connected at its ends to said contact portion, and a stud or supporting device connected to but insulated from said arm or bracket intermediate its ends, said arm or bracket being reduced in cross-section whereby the transfer of heat from the contact portion of the collector-ring to said stud and insulation is impeded.

16. A collector-ring, comprising a main cylindrical portion, radial insulated studs forming supporting means therefor, and extensions from the main portion of the collector-ring for engaging said studs and connecting them to the body portion of the collectorring, said connecting portions being of reduced cross-section whereby the transfer of heat from the main portion of the collectorring to the supporting-studs is impeded.

ln witness whereof l have hereunto set my hand this 8th day of February, 1905:

HENRY GEISENHONER. Witnesses:

BENJAMIN B. HULL. HELEN ORFORD. 

